Grinding together a cement mix - whereby the hard and soft components are separately ground before being mixed and sieved

摘要

Device for grinding two components having different degrees of hardner and brittleness comprises two parallel arranged high pressure roll presses (10,11) with a common de-agglomeration sieve (17) connected to both. The hard material (12) is fed to one press (10) and soft material (15) and/or at least a part of the coarse fraction (21) removed by sieve (17) fed to the other. USE/ADVANTAGE - Esp for preparing cement powder from sand, limestone mixture. The grinding is achieved using min. total m energy requirement.